Uniswap is a decentralized cryptocurrency exchange (DEX) that allows you to trade various ERC-20 based tokens. Thanks to decentralization, it is a more flexible exchange, which differs from traditional exchanges in that it does not store user funds, and customers do not have to provide their data and undergo a verification procedure (the so-called KYC) or create an account. In addition, Uniswap does not use an order book to determine the price, but uses formulas to match the price to the proportion of tokens in its liquidity pools. Uniswap users can earn money from their tokens by placing them in the exchange's liquidity pools.
UNI is the Uniswap exchange token, which belongs to the so-called token governance, which means that its holders can influence decisions regarding the development of the Uniswap platform. They can also make grants, enter into partnerships and provide liquidity. Soon, the Uniswap team will no longer be directly involved in the project, and all decisions regarding the stock exchange will be made by UNI token holders.